dickerson



G. W. DICKERSON.

TELEPHONE SWITCH.

APPLICATION man lune 26,1916..

Patented Apr. 12, 1921.

4 SHEETS-SHEET 3.

g@ u@ m l l..

jizz/52222725 G. W. DICKERSON.

TELEPHONE SWITCH.

APPLICATION FILED JUNE 26.1915.

Eatented Apr. 12, H2L

4 SHEETS-SHEET 4.

jizz/522ml' UNITED STATES FATFNT QFFEQE.

GEORGE W. DICKERSON, 0F GALION, OHIO, ASSIGNOR T0 THE NORTH ELECTRICMANUFACTURING COMPANY, OF G-AIION, OHIO, A. CORPORATION OF OI-IIO.

TELEPHONE-SWITCH.

Specification of Letters Patent.

Patented Apr. 12, 1921.

Application filed `Tune 26, 1916. Serial No. 105,781.

'and useful Improvements in Telephone- Switches, of which the followingis a speciication. Y

My invention relates to electrical switches and is especially designedto be used 4in connection with telephone exchange systems or othersystems wherein it is desirable to interconnect a large number ofelectrical circuits.

This switch is particularly adapted to be used as' a line selectingswitch for quickly and automatically effecting connections with callingsubscribers lines in telephone exchange systems.

The switch is preferably arranged to serve a group of one-hundred lines.The lines are formed into sub-groups of ten lines each and connected toten parallel rows of flexible contact springs.

The movement of the springs of each row is controlled by an associatedelectro-inagnet. The springs of each row are arranged in sets, one setbeing allotted to each line. In the present instance I have shown threesprings in pairs as comprising a set. As there are ten lines served byeach row there will be thirty pairs of contact springs to each row.

Intersecting or crossing the tens rows of flexible springs at rightangles are ten sets of units contacts. Fiach set of these contactscomprises three metallic strips, pro` vided respectively with tendownwardly7 projecting extensions.

These extensions are normally out of engagement with the tens contactsprings. Each row of units contacts is provided with an electro-magnetfor controlling its movement. In order to connect with any line it isonly necessary tooperate the electro-magnet associated with the tens rowcontaining the desired contact. The operation of this electro-magnetwill bring the sets of contacts of the row. into alinement with thetensions of all the units strips. Then by operating the electro-magnetof the strip which is in alinement with the contacts of the desiredline, the extensions of this operated strip will come into engagementwith the contacts of the desired line.

The details of construction and operation vill be pointed out in thedescription to fol- My invention is illustrated in the accompanyingdrawings wherein:

Figure l is a plan view of the switch.

Fig. 2 is a side View of the switch.

3 is a rear view of the switch.

Fig. 4 is the side sectional view on line a-ot of Fig. 1.

Fig. 5 is a side sectional view on line b-b of Fig. l.

Fig. 6 shows a side view of a units element in detail.

Fig. 7 shows a plan view of a units element.

Fig. 8 shows a plan view of the tens element with a number of the lineor group contacts removed.

Fig. 9 is an enlarged sectional view showing a portion of a tenselement.

ig. 10 is a schematic arrangement showing the manner of cooperation ofthe tens and units elements.

kReferring to the drawings, the various magnets and moving parts aremounted and supported within a main frame or case 50. The tens magnets40 are mounted on opposite sides of this case, live being on one sideand five on the other. The units magnets 50 are mounted in a similarmanner on opposite sides of the case. The magnets are held in place bythe screws 45. Each tens magnet 40 is provided with an L shaped armature42, plainly shown in Figs. 2 and 5. An opening is provided in the frame50 to allow the armature to be mounted so the smaller arm can be engagedor attracted by the core of electro-magnet 40. Each armature is held inplace by means of a leaf spring 43 which bears against the longer sideof the armature, as shown in Figs. 2 and 5.

By referring to Fig. 2, it will be noted that the opening in the frameis cut in such a. manner to provide a series of lips or pro Iiections 46which pass through the cut-out portions 48 of the armatures. Extendingacross the four sides of the frame are bars or strips 44 which arefastened to the frame by means of the screws 47. These bars pass justbelow the bottom portion of the armatures as shown inv Figs. 2, 3 and 4,and serve to securely hold them in position. There is, however,suliicient space between the bars hear SO and e their nornial S5 and oCorne in alinerits s are belowv the units har `he u -its hars, howlidehethe pairs ol extension.

or Contact 75 'd ivill When the har rt d hy the e tension under normallyadpisted.

each comprisstetsa it rollows that t en sets olf units e oper-atei `heten u1 ontaets will '-.nsions ll e ot contacts in ll of the No.

meet With any villl l rener units ma s the tens hars or G ars ntaets 22.

ere with the t .i the projections on exe i to th 22 are .L L downwardlyso as to s tions th ter;A

ill

enger en )Listing nut 2T and cause the use a eonsequent mover ndi tens

J. 1A 'o1-LCL ions .f- [eo n naied en iorinal Co l e ad more ai )rin leare ten unit J! i eo rent en sets e con extens Quinn is shown in thedraw ooerzite sets o nient Wit s a C e b 7 1.). nu. oo. .L G LL C .0. iD n S i.

ed to operate rounded portions xg .VIL

20, as shown pass p ol' Dre-- Tl o i f1 'L re tens hai 40 winch is orLlnsula e tlin the pairs of rno's Fig serve to support the hars 2O and nat 25 and ded W pposite en hioh has a o reeeive t ed on e oi d portierinut @el a series the eontae ded Wit i tv the sil er insula Qroj eet aho)ed y shown i2 is arran rods are threaded 2S iv Ting this Athin th ichass. These Contact springs are (l provi openings 2 thi e ends o 22project hej/coni' Conta airs ot Contacts to 0 l0 molded 111 theinsulated Dar ded at its o i pted i the threade 1g'. 9 an ate it ed in aconclu )air o Py rota rCl ion a loe pos These contee or beneath the hed3l so as to form terr tina oushin o fl These square steek, as shown at2", ivliie enga"- through in n he op fasten al 80, as Dlain L gridlyarm.

ed or reduced as show hieh n the brackets 36 Inoun ial is provided xvitl2l to aeeoznrnod The thirt 40 each tens har 2O are arranged in l 44: andthe armatures t0 allow free Inovement of the latter.

Each armature a rod or 5 made of is round 35. The portion is provithread v.' Y in the metallicl hui The bar 2O is provi with a metallicthreaded openin l5 rod 29.

The rods 29 and the throng'1 the frame 50.

2O The bar or rod 26 is also provid adjusting nut 27. threaded portionturns \v 23. In order to ho in its adjusted posit 25 vided.

ing rnater ooenings springs 22 D bowed as shown 30 the flared ends whichbar 20. There are thirty har Q0 springs 22.

Q2 are ri ing Inateri 5 and 9.

to Whi h electrica neeted.

Titae ten, there being` three each set.

t enz-rave 115 raped to asve shown 12o ereo il'j neeessar n tions int Ysleeta particuhar Containireuits of the ieee of nieta rar Contact l n.11S .117.34515 "f L O Sl Ulli? The r rod eushi .fr or r is co1.

. otendly and are adapted nie- erat noivn. nula lio the plu i arenioided or ernblocks l and 1er o' o';

Si si u ed `portion 7 letal hin lso provi and .7, the details .ch unitha ir' is a t. 6 ion and Lian L vided ivith re nnr-terial Wl molded deme flexible e ating hloc1 ot construct' the units bars or contacts aregli kiCki h trips l, 2 and bedded in the insulat in F10. 7. 1

-leferrino to Fi units bars are nro 6 enihed insulati :i

sions project to engage t talhc s shown The insu 60 with a metallic busisoi? isin od educed the units hars brackets 37 mounted on top of theframe 50.

hinel llinto Whie1 q ree pa nected in the mair 1;'5

1') l o, oi each set are le; that is to say, No. l

. a seJ eonpr snr or contacts a re con nier shoivn.

rEhe units eentaets l 2, Connected in multi@ i n The rods l5 and the rve to sungort 7 ser rouo'h tl l5 is threaded. porti ns and pass th stripofeach of the rows are connected together and likewise strips 2 and 3 ofeach row are connected together.

The contacts 1, 2 and 3 are shown ,connected to a cord circuit of thestandard type.

lt will be'noted that the substation 110 comprising the usual receivertransmitter' and ringer is connected to the line conductors which extendto the line relay 112 and to ground through the contacts of the cutoffrelay 111.

The removal of the receiver closes the circuit or" relay 115)J therebylighting the signal `lamp 113. The lighting of this lamp indicates thenumber of the particular calling line. In order to connect the callingline to the cord circuit the button 116 is de pressed thereby completingthe circuit of the electromagnet Ll0. The operation of this magnetcauses the associated row of contacts 22 to be brought into alinementwith the row of contacts 1, 2, 3.

By pressing the button 115 the electromagnet 50 is operated and bringscontacts 1, 2, 3 into engagement with the set of contacts associatedwith the calling line. As soon as this connection is effected relays 102and 111 are placed in series. The operation of` relay 111 disconnectsthe line relay 112 thereby extinguishing the signal lamp 113.

Talking current is supplied to the calling subscriber at 110 through theWinding of relay 100 and the winding of coil 101.

The connection is completed to a called line or trunk by placing theplug into the jack 107.

At the termination of the conversation the calling subscriber uponreplacing his re ceiver causes the restoration of relay 100. rlihisrelay in restoring completes the circuit of the supervisory lamp 103indicating that the line should be disengaged, whereupon the plug 106 isremoved from the jaclr107` and the buttons 115 and 11G restored to theirnormal position. The restoration of these buttons causes thedeenergization of magnets l0 and 50 thereby causing the switch contactsto resume their normal position.

lllhile l have shown the magnets 10 and 50 operated by buttons 115 and11G they can be automatically operated upon the removal or" the receiverat the earring sub-station in amanner similar to the operation of thetens and units relays shown in the following patents to E. E. Clement:1,105,490 of July es, isis; assise or NOV. a, i909; momie of August 11,101e; 1,107,152 of August 1 1, 1914i and 1,109,017 of September 1, 1914.

The tens magnet-s Z10 and the units inagnets 50 can be substituted forthe tens and units relays of theforegoing patents.

The contacts controlled by the tens and units magnets t@ ani .50 when aplurality of sets are used are connected in the same manner as thecontacts of the tens and units relays of different groups or sets.

While l have shown a switch provided with ten. rows of tens contacts andten rows of units contacts, the number can be increased to serve a largenumber ci" lines or trunks or diminished to serve a smaller nimber.

The switch as designed forms a compact structure with a minimum numbervof parts and wiring. All the parts are readily accessible and capableof quick and accurate adjustment.

YWhile l have used the term telephone switch7 in the claims, it is to beunderstood that the switch is not limited to such use but may be usedfor purposes of connecting any form oi electrical circuits.

Having thus described my invention what I desire to secure by LettersPatent is:

1. ln a telephone switch, a plurality of sets oi contacts arranged in arow independent of one another', each set of contacts comprising aplurality of flexible springs, a plurality of other cont-acts arrangedin rows, means for operating a row of individual flexible contacts, andmeans for operating the second mentioned contacts for cooperating withan individual set of flexible contacts independent of the other contactsin the row.

2. ln a telephone switch, a plurality of rows of contacts, each rowcomprising a set or" flexible springs independent of one another, aplurality of other rows of contacts arranged right angles to the irstmentioned rows, means for causing the coperation between said contactsby first operating a row of flexible springs and thereafter operating arow of the second mentioned contacts.

8. ln a telephone switch, plurality of rows of contacts, each rowcomprising plurality of sets of flexible contact sppings independent ofone another, a plurality of coiiperating contaegs arranged at rightangles to said rows, means comprising an electro-magnet for operating arow of flexible contacts. and means comprising an electro-magnet foroperating the coperating contacts to engage a particular set of flexiblecontacts, said electro-magnets being the sole ans for causing tbcengagement olf said contacts.

1. ln a telephone switch. a row f flexible contacts, electro-magnetcommon to am for operating said row of contacts, a plu rality of sets oicooperating contacts arranged at right angles to said row. anelectro-magnet for operating said cooperating contacts means foroperating both of said electro-magnets for causing the engagement ofaparticular set of flexible contacts with said cooperating contacts, saidelectro-mag- CII nets being the sole means for causing the engagement otsaid contacts.

5. In a telephone switch, a plurality ot flexible contacts arranged in arow, said contacts being rigidly fastened 'at one end, an insulatedelement, tie free ends ot said contacts passing tl rough said insulatedelement, a plurality ot coopera" g contacts, means comprising anelectromagnet tor operating said element in order to bring the free endsot said springs into alinement with said cooperating contacts.

G. In a telephone switch, the combinat-ion ot a plurality of sets otflexible contacts arranged in a row independent ot one another, saidcontacts arranged in pairs, a movable element, the tree ends orn saidcontacts passing through said movable element, a plurality otcooperating contacts, means for lirst operating said elements to movesaid flexible contacts into alincment with said cooperating contacts,and means for operating said cooperating contacts to engage with theflexible contacts with which they are alined.

7. In a telephone switch, a plurality oi flexible contacts arranged inrow, one end of each of said contacts being rigidly fastened, a movableelement, the free end of each ot said contacts passing through saidmovable element, a plurality ot sets of cooperating contacts, meanscomprising an electromagnet 'for operating said element to bring saidflexible contacts into alinement with said cooperating contacts, andmeans comprising an electromagnet for operating said cooperatingcontacts to engage said flexible contacts.

8. In a telephone switch, a row of contacts comprising' a plurality ofsets of flexible contacts independent of one another, a plurality otrows oi` secondary contacts, means for operating said row of flexiblecontacts whereby all of said sets brought into alinement with all therows ot secondary contacts at the same time, and means for operating anyone of said rows ot secondary contacts for engaging the particular setof flexible cont-acts with which it is alined, the operation ot saidrows being in a longitudinal direction only.

9. In a telephone switch, the combination with a pluralityv ot sets otflexible contacts arranged in a row. a movable element, the free ends otsaid contacts passing through said movable clement, a plurality orsecondary contacts, means tor operating said element to more saidflexible contacts into alinement with said secondary contacts, and meansfor operating a particular secondary contact tor engaging the flexiblecontact with which it is alined.

l0. In a telephone switch, a plurality of sets of flexible contactsarranged in a row, one end of each ot said contacts being rigidlyfastened, ay movable element, the free end oft each oit said contactspassing through said movable element, a plurality ot sets ot secondarycontacts, means 'for operating said clement to bring said flexiblecontacts into alinement with said secondary contacts, and means ioroperating any one ot said sets ot secondary contacts to engage the saidset ot flexible contacts with which it is lined. y

ln a telephone switch, a plurality of rows ot contacts, each rowcomprising a plurality ot sets oit flexible contacts independent of oneanother, a plurality of rows of secondary contacts, means for operatingparticular row ot' flexible contacts whereby each set ot said row isbrought into alineinent with a particular row of secondary contacts, andmoans for operating any row ot' secondary contacts to engage the set offlexible contacts with which it is alined, the operation of said rowsbeing in a longitudinal direction only.

.12. ln a telephone switch, the combination of a plurality ot sets ofprimary contacts arranged in a row independent of one anot ier, aplurality of rows of secondary contacts, each row of said secondarycontacts being primary contacts, means for operating the row et primarycontacts for bringing each individual set into alinement with itsallotted row of secondary contacts, and means for operating a row ofsecondary contacts for engaging the set ot primary contacts with whichit is alined, the operation of said rows being in a longitudinaldirection only.

ln a telephone switch, the combination ot plurality of rows ot primarycontacts, each row comprising a plurality of sets ot contactsindependent of one another, a plurality of rows of secondary contacts,each of said rows ot secondary contacts having access to a particularset of individual primary contacts of each row, means for operating anyrow of said primary contacts whereby each set of the row is brought intoalinement at the saine time with a row of secondary contacts,means foroperating any row of secondary contacts for engaging the set ot primarycontacts with which it is alinedv` the operation ot said rows being in alongitudinal direction only.

lu a telephone switch, the combination ot a plurality ot rows of primarycontacts, each row comprising a plurality of sets of contact springsfastened at one end indep-enoent of one another, a plurality of rows ofsecondary contacts extending at right angles to the rows of primarycontacts and adapted to engage the free ends thereof, each row ofsecondary'contacts arranged to have access to a. particular set ofprimary Contacts of each row, means tor operating allotted to aparticular set ot said primary contacts whereby the free ends of eachset of the row is brought into alinement at the same time with a row ofsecondary contacts, means for operating any row of secondary contactsfor engaging the set of primary contacts with which it is alined, theoperation ot said rows being in a longitudinal direction only.

15. ln a telephone switch, the combination of a banlr of primarycontacts arranged in rows, each row comprising a plurality of sets ofcontacts independent of one another, a plurality of rows ci secondarycontacts provided with downwardly extending projecticns for engaging'the primary contacts, each row of secondary contacts having access to aparticular set ot individual primary contacts of each row, means toroperating a row of said primary contacts whereby each individual set isbrought into alinement at the same time with the rows of secondarycontacts to which it has access, means for, operatinol any row otsecondary contacts for causing the downwardly projecting extensions toengage the particular set or primary contacts with which it is alined,the operation of said rows being in a longitudinal direction only.

1 ln' a telephone switch, the combination with a plurality oiw flexiblecontacts arranged in a row, a movable adjustable element, said contactspassing through said movable adjustable element, a plurality or"coperating contacts provided with a common adjusting device, means foroperating said element to move said flexible contacts into alinenentwith said cooperating con l tacts, and means for operating saidcoperating contacts to engage said flexible contacts.

17. ln a telephone switch, the combination with a plurality of contactsmounted within a single unit structure, certain of said contactscomprising a number or' rows of denible primary contacts, other of saidcontacts comprising a plurality ot rows of secondary contacts, a magnetmounted upon said unit structure individual td each of said rows ofcontacts, means for operating said magnets for causing the primary andsecondary contacts to cooperate, said magk nets serving as the solemeans for causing the coperation of said contacts.

18. ln a telephone switch, the combination with a bank or' contactsmounted within a "frame, said contacts comprising a plurality ot rows ofiiexible contacts, each of said rows being provided with an adjustablemovable element, a plurality of rows of secondary contacts mounted uponsaid trame, each row oit flexible contacts and each row ot secondarycontacts being provided with a magnet mounted upon said frame, means foroperating said magnets for causing the coperation of the flexible andsecondary contacts, said magnets serving as the sole means tor causingthe coperation orl said contacts.

i9. ln a telephone switch the combination of a plurality o' sets offlexible contacts arranged in a row independent ci one another, saidcontacts arranged in pairs, a movable element, the free ends ot saidcontacts passing through said movable clement, a plurality oi'copcrating contacts, means :lor moving said element to bring saidflexible contacts into alinement with said coperating contacts, andmeans for operating said coperating contacts to cause them tot form awiping contact between said pairs of flexible contacts.

20. ln a telephone switch, the combina* tion ot a plurality of linecontacts, arranged in a row, said contacts arranged in sets, each setbeing allotted to an individual line, a magnet common to said row, a rowof secondary contacts :tor each set ot line contacts, a magnet for eachrow of contacts, means for operating the magnet of the row of linecontacts for bringing' each set ot individual contacts into alinement atthe same time with a row of secondary contacts, means for operating anymagnet ot a secondary row tor causing the contacts thereof to effectengagement with the set of individual contacts with which it is alined.

21. ln a telephone switch, a row ot primary contacts, an electromagnetcommon to and for operating said row oic contacts, a plurality of setsot secondary contacts arranged at right angles to said row, anelectromagnet for operating said secondary contacts, means for causingthe engagement of a particular set of primary contacts with saidsecondary contacts, means Yfor energizing said electromagnets, a singleenergize.- tion of said electromagnets serving to-cause the engagementof said contacts,

22. ln a telephone switch, a plurality of primary contacts arranged in arow, one end of each oi" said contacts being rigidly fastened, a movableelement, the tree end of each oit said contacts being controlled by saidmovable element, a plurality of sets of secondary contacts, meanscomprising an electromagnet Jfor operating said movable element to bringsaid primary contacts into alinement with said secondary contacts, andmeans comprising an electromagnet for operating said secondary contactsto engage said primary contacts, said magnets being the sole means forcausing the engagement of said contacts.

23. ln a telephone switch, the combination oia plurality of sets otprimary contacts arranged in a row, a movable element, said elementcontrolling the movement o' said primary contacts, a plurality ofsecondary contacts, means for operating said movable element to moresaid primary contacts into alinement with said secondary contacts, andmeans for operating a particular secondary contact for engaging theprimary contact with which it is alined.

24. In a telephone switch, the combination of a plurality of contacts"mounted within a single unit structure, certain of said contactscomprising a plurality ot rows of primary contacts` other of saidcontacts comprising a plurality of rows of secondary contacts, magnetindividual to each row of contacts, means for operating sait magnets forcausing' primary and secondary contacts to cooperate, said magnetsserving as the sole means for said cooperation.

25. In a telephone switch, plurality of rows of primary contacts, eachroy.v comprising a set of sprinr independent oi" one another, aplurality oi rows of secondary contacts arranged at right angles to thefirst mentioned rows, means tor causing the cooperation between anynumber ot said primary and secondary contacts by operating a pluralityont rows ot primary contacts and thereafter operating a pluralityr or"rows of secondary contacts.

26. In a telephone switch, a plurality of rows of primary contacts, eachrow comprising a plura ity ot sets ot contact springs independent of oneanother, plurality ot' rows ot secondary contacts arranged at rightangles to the rows ci primary contacts, a magnet individual to eac rowot contacts, means tor operating any number of said magnets for causingthe cooperation of any number of primary and secondary contacts, saidelectromagnets being the sole means for causing the said cooperation.

27. In a telephone switch, a plurality ot sets of primary contactsarranged in a row independent ot one another, a plurality ot rows ofsecondary contacts, means for causing the coperation ot a plurality or'primary and secondary sets ot contacts by first operating the row 01"'primary contacts and then operating the required number of rows ofsecondary contacts.

28. In a telephone switch, a plu 'ality of rows of primary contacts,each row comprising a plurality of sets of contacts independent ot oneanother, a plurality of rows of secondary contacts, means for operatingany number of rows of primary contacts whereby a set of each row isbrought into alinement with the rows of secondary contacts, and meansJfor operating any number of rows of secondary contacts so as to causethe cooperation ot contacts with which they are alined, the operation ofsaid rows being in a longitudinal direction only.

29. In a telephone switch, the combination of a plurality of rows ofprimary contacts, each row comprising a plurality ot sets of contactsindependent ot one another,

a plurality ot rows ot secondary contacts,

each row of secondary contacts having access to a particular set ofindividual primary contacts of each row, means for operating any numberot rows of primary contacts whereby each set of the row is brought intoalinement with a row ot secondary contacts, means for operating anynumber of rows of secondary contacts for engaging the set of primarycontacts of the row with which it is alined, the operation of said rowsbeing in a longitudinal direction only.

30. In a telephone switch, a plurality of primary contacts, arranged ina row, an electromagnet for said row ot' contacts, plurality ofsecondary contacts, an electromagnet for said secondary contacts, meansfor energizing said electromagnets, a single onergization of saidelectromagnets Serving to cause the coperation ot said primary andsecondary contacts.

In testimony whereof I affix my signature in the presence of twowitnesses.

GEORGE WV. DICKERSON. IVitnesses JOHN PonA'rsoH, A. MCCUNE.

